Dip angle-compensated one-way wave equation migration

doi:10.1071/EG09027

	Dip angle-compensated one-way wave equation migration
	Sun, Weijia 1,2; Zhou, Binzhong 1; Fu, Li-Yun 2
刊名	EXPLORATION GEOPHYSICS
	2010-06-01
卷号	41 期号:2 页码:137-145
关键词	Dip Angle Correction One-way Wave Equation Post-stack Migration
ISSN号	0812-3985
DOI	10.1071/EG09027
文献子类	Article
英文摘要	Conventional migration algorithms based on one-way wave equations in a Cartesian coordinate system often under estimate amplitudes, especially at large propagation or reflection angles. This has a deleterious effect on seismic images and should be corrected. We illustrate the nature of the problem by working in the more natural spherical coordinate system and offer two simple solutions to the problem: (1) a wave combination scheme where the wave extrapolation is done independently for each Cartesian coordinate and the resulting wavefields are summed and (2) a simple wave projection scheme whereby the conventional one-way propagator is corrected by means of a factor 1/cos(theta), where theta is the angle of the wave measured from the vertical axis or the reflector angle. The wave combination scheme is applicable to waves with propagation angles beyond 90 degrees, but will roughly triple the computation time compared with conventional one-way propagators in the 3D case. The wave projection scheme is more economical and can easily be implemented in the wavenumber (or slowness) domain at no extra computational cost. These schemes are valid both in depth-dependent media and in laterally heterogeneous media. In addition, the proposed amplitude-preserving schemes can be applied to all methods based on the conventional one-way wave equation. We then develop and implement the second approach to demonstrate its validity by means of numerical examples.
WOS关键词	TRUE-AMPLITUDE ; FOURIER MIGRATION ; DOMAIN
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	CSIRO PUBLISHING
WOS记录号	WOS:000278388500001
资助机构	Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/72592]
专题	中国科学院地质与地球物理研究所
通讯作者	Sun, Weijia
作者单位	1.CSIRO Earth Sci & Resource Engn, Kenmore, Qld 4096, Australia 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Sun, Weijia,Zhou, Binzhong,Fu, Li-Yun. Dip angle-compensated one-way wave equation migration[J]. EXPLORATION GEOPHYSICS,2010,41(2):137-145.
APA	Sun, Weijia,Zhou, Binzhong,&Fu, Li-Yun.(2010).Dip angle-compensated one-way wave equation migration.EXPLORATION GEOPHYSICS,41(2),137-145.
MLA	Sun, Weijia,et al."Dip angle-compensated one-way wave equation migration".EXPLORATION GEOPHYSICS 41.2(2010):137-145.